GNU Radio 2.x: gr_sync_block.h Source File

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# gr_sync_block.h

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    00001 /* -*- c++ -*- */
    00002 /*
    00003  * Copyright 2004 Free Software Foundation, Inc.
    00004  *
    00005  * This file is part of GNU Radio
    00006  *
    00007  * GNU Radio is free software; you can redistribute it and/or modify
    00008  * it under the terms of the GNU General Public License as published by
    00009  * the Free Software Foundation; either version 2, or (at your option)
    00010  * any later version.
    00011  *
    00012  * GNU Radio is distributed in the hope that it will be useful,
    00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00015  * GNU General Public License for more details.
    00016  *
    00017  * You should have received a copy of the GNU General Public License
    00018  * along with GNU Radio; see the file COPYING.  If not, write to
    00019  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00020  * Boston, MA 02111-1307, USA.
    00021  */
    00022
    00023 #ifndef INCLUDED_GR_SYNC_BLOCK_H
    00024 #define INCLUDED_GR_SYNC_BLOCK_H
    00025
    00026 #include <gr_block.h>
    00027
    00034 class gr_sync_block : public gr_block
    00035 {
    00036  private:
    00037   unsigned      d_history;
    00038
    00039  protected:
    00040
    00041   gr_sync_block (const std::string &name,
    00042                  gr_io_signature_sptr input_signature,
    00043                  gr_io_signature_sptr output_signature);
    00044
    00045  public:
    00046
    00054   unsigned history () const { return d_history; }
    00055   void  set_history (unsigned history) { d_history = history; }
    00056
    00062   virtual int work (int noutput_items,
    00063                     gr_vector_const_void_star &input_items,
    00064                     gr_vector_void_star &output_items) = 0;
    00065
    00066
    00067   // gr_sync_block overrides these to assist work
    00068   void forecast (int noutput_items, gr_vector_int &ninput_items_required);
    00069   int  general_work (int noutput_items,
    00070                      gr_vector_int &ninput_items,
    00071                      gr_vector_const_void_star &input_items,
    00072                      gr_vector_void_star &output_items);
    00073 };
    00074
    00075 #endif /* INCLUDED_GR_SYNC_BLOCK_H */